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5. Service Modes, Error Codes, and Fault Finding
Index of this chapter:
5.1 Test Points
5.3 Service Modes
5.4 Stepwise Start-up
5.5 Service Tools
5.6 Error Codes
5.7 The Blinking LED Procedure
5.8 Protections
5.9 Fault Finding and Repair Tips
5.10 Software Upgrading
5.1
Test Points
As most signals are digital, it will be difficult to measure
waveforms with a standard oscilloscope. However, several key
ICs are capable of generating test patterns, which can be
controlled via ComPair. In this way it is possible to determine
which part is defective.
Perform measurements under the following conditions:
•
Service Default Mode.
•
Video: Color bar signal.
•
Audio: 3 kHz left, 1 kHz right.
5.2
Hotel mode
Before the service modes can be activated, the set needs to be
switched into normal consumer mode (MTV-Mode) first. Use
an iTV setup remote control (type: RC2573/01, 12nc:
3139 228 88782) to key in the code '024995' (slowly) directly
followed by the MENU button. The text messages "TV Is Now
In MTV Mode" and "Please Do A Cold Start!" appears on the
screen. Disconnect the set for a few seconds from the mains
supply, reconnect the set to the mains supply again. The set is
now in the normal consumer mode (MTV-Mode).
After repair, place the set into hotel mode (iTV-Mode) again.
Key-in the same code on the remote control as described
above. The text message "TV Is Now In ITV Mode" appears. A
cold start must be performed as described above. The set is
now in the hotel mode (iTV-Mode) again.
5.3
Service Modes
Service Default mode (SDM) and Service Alignment Mode
(SAM) offers several features for the service technician, while
the Customer Service Mode (CSM) is used for communication
between the call centre and the customer.
This chassis also offers the option of using ComPair, a
hardware interface between a computer and the TV chassis. It
offers the abilities of structured troubleshooting, error code
reading, and software version read-out for all chassis, see
division 5.5.1 ComPair.
5.3.1
Service Default Mode (SDM)
Purpose
•
To create a pre-defined setting, to get the same
measurement results as given in this manual.
•
To override SW protections detected by stand-by
processor and make the TV start up to the step just before
protection (a sort of automatic stepwise start up). See
paragraph "Stepwise Start Up".
•
To override SW protections detected by MIPS. See also
paragraph "Error codes".
•
To start the blinking LED procedure (not valid for
protections detected by standby software).
Service Modes, Error Codes, and Fault Finding
PB52.1HU LB
Specifications
Table 5-1 SDM default settings
Region
Freq. (MHz)
Europe, AP(PAL/Multi)
475.25
Europe, AP DVB-T
546.00 PID
Video: 0B 06 PID
PCR: 0B 06 PID
Audio: 0B 07
NAFTA, AP-
61.25 (ch 3)
NTSC,LATAM
•
Tuning frequency 61.25 MHz for NTSC: The TV shall tune
to physical channel 3 only if channel 3 is an analog channel
or if there is no channel 3 installed in the channel map. If
there is a digital channel installed in channel 3, then the
frequency to which the set will tune, would be as specified
in the channel map and could be different from the one
corresponding to the physical channel 3.
•
All picture settings at 50% (brightness, color, contrast).
•
All sound settings at 50%, except volume at 25%.
•
All service-unfriendly modes (if present) are disabled, like:
–
(Sleep) timer.
–
Blue mute/Wall paper.
–
Auto switch "off" (when there is no "ident" signal).
–
Hotel or hospital mode.
–
Child lock or parental lock (manual or via V-chip).
–
Skipping, blanking of "Not favorite", "Skipped" or
Locked" presets/channels.
–
Automatic storing of Personal Preset or Last Status
settings.
–
Automatic user menu time-out (menu switches back/
OFF automatically.
–
Automatic volume levelling (AVL).
How to Activate SDM
For this chassis there is one kinds of SDM: an analogue SDM
Tuning will happen according table "SDM Default Settings".
•
Analogue SDM: use the standard RC-transmitter and key
in the code "062596", directly followed by the "MENU"
button.
Note: It is possible that, together with the SDM, the main
menu will appear. To switch it "off", push the "MENU"
button again.
•
Analogue SDM can also be activated by shorting for a
moment the two solder pads on the SSB, with the
indication "SDM". Activation can be performed in all
modes, except when the set has a problem with the Stand-
by Processor.
After activating this mode, "SDM" will appear in the upper right
corner of the screen (if you have picture).
How to Navigate
When you press the "MENU" button on the RC transmitter, the
set will toggle between the SDM and the normal user menu
(with the SDM mode still active in the background).
How to Exit SDM
Use one of the following methods:
•
Completely remove the power by removing the power plug.
5.
EN 13
Default
system
PAL B/G
DVB-T
NTSC M
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